I was trying to use installinstallmacos.py to create an installer disk image for High Sierra 10.13.6 (I need an offline installer and downloading from App Store only downloads a ~4MiB stub file with further install most probably requiring an active internet connection).
The above script lists two different variants of High Sierra 10.3.6:
ProductID Version Build Title 091-53703 10.13.6 17G2112 macOS High Sierra 091-94326 10.13.6 17G65 macOS High Sierra
The page How to find the macOS version number on your Mac, in fact lists only
17G65 for High Sierra 10.13.6 and states:
Below are the versions and builds of each Mac operating system made available from the Mac App Store,
What is the difference between the two?